foo.cc: In function 'int main()':
foo.cc:16:20: error: unable to find string literal operator 'operator""sum' with 'const char [5]', 'long unsigned int' arguments
   16 |  sum=sum/numprintf("%.2d"sum);
      |                    ^~~~~~~~~
foo.cc:16:10: error: 'numprintf' was not declared in this scope; did you mean 'dprintf'?
   16 |  sum=sum/numprintf("%.2d"sum);
      |          ^~~~~~~~~
      |          dprintf
foo.cc:8:8: warning: unused variable 'b' [-Wunused-variable]
    8 |  int i,b=100,num,sum;
      |        ^

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